Samuel h



(No Model.)

s. H. HA'RRINGTON.

GAR GOUPLlNG. y

'Patented Jan, 17, 1,888.k

UNITED STATES PATENT OFFICE@ SAMUEL E. HAEEINGTON, OE COLUMBUS, OHIO, ASSIGNOE'BYMESNE ASSIGNMENTS, TO THE CONSOLIDATED COUPLINCr COMPANY.

CML-couPLINC.

SPECIFICATION forming part of Letters Patent No. 376,713, dated January 17,1888. Application tiled J une 23,1887. Serial No. 242,243. .(No' model.)

To all whom it may concern: v

Be it known that I, SAMUEL H. EARRING- TON, of Columbus, county of Franklin, State of Ohio, have invented a new and useful Improvement in Car-Couplers, of 'which the fol I lowing is a true and exact description, referf, vice patented by myself, August 12, 1886, in Letters Patent No.` 350,486.

The object of my invention is to increase the hold of the latch-pin upon the movable jawof such couplers and to strengthen the pin in those parts which are exposed in use to shearing strains. This I accomplish by con-- structing the coupler head, jaw, and pin in the manner illustrated in the accompanying drawings, in which-a Figure 1 is a plan viewy of the couplerhead, the jaw being indicated byvdotted lines. Fig. 2 is a perspective view of the movable jaw; Fig. 3, an elevation of the latch-pin, and Fig. t'asimilar elevation taken at right angles to the view of Fig. 3. i

A is the coupler-head. which is recessed for the entrance of thejaw B in the usual way, a;

projection, a, being formed with a cylindrical surface to serve as the hinge on which the jaw B turns, and the opposite face, a', of the recess .beingv made concentric with the cylindrical projection a. The surfaces b and b of the jaw B are made of similar'v curvature to the surfaces a and a', respectively.y

c2 a2 is a circular hole formed in the upper portion of the coupler-head A and centered in or nearly in the curved surface a' at the bottom of the couplerfhead and belowthe recess formed for the entrance of the jaw B.' The hole is contracted to the substantially semicircular form indicated by the lines a'z a, the Vmetal of the `head`being carried across the hole a2 a2, so as to formv the shoulder a? within its recessed portion, thesemicircularhole cia3 lying `outside of the curved surface c', which bounds the recess left for the jaw.

In the jaw B a semi-cylindrical recess, b?, is formed, throughA which the latch-pin can pass when the jaw is closed, and the jaw is further recessed in its upper edge, as shown at b3, said recess being ofa breadth equal to that of shoulder, b4. l j

C is my improved latch-pin. It is 'cylindrical in its'upper portion, 0, andpreferably of the size of an Ordinary coupling-pin. At

c it is cut awayy to form the shoulder c., and 6o continued in the semi-cylindrical form indicated at c2. c3 is aring, to which a chain may be attached, as describedl in my before-mene f' tioned- Letters Patent.

The operation of, this device does not differ .5 5 from that described in my patent No.350,486;' but by forming the latch-pin and latch-pin hole as described I am enabled to deepen the recesses b2 and yb3 in the jaw and cause the latch-pin C to project vfarther to the inside of 7o A the jaw-recess 'in the head A, thus. more eff,` fectually latching the jaw.

In the old construction,when the jaw B was used tocouple with a link by means otits pin-hole b5 and the Ajaw not latched in its 75 closed position, the portion of `the latch-pin' which by engaging with the shoulder b4 preg vented the jaw B from being pulled out of the recess in the head A was found not strong enough/to resist the shearing strains pnt uporro it; but by Ymaking the portion c2 of the pin C.- of the semi-cylindrical form shown, a great increase of` metal and` consequently of` strength is gained in the portion of the pin subject `to n such strains, and the shearing strains come 8 5 upon it across its largest diameter.

Having now described my invention,what I A claim asnew, and desire to secure by Letters Patent, is l l. In a carcoupler substantially as vspeci-9o fied, a vlatch-pin hole, substantially concentric with the curved inner surface of the recess in the 'coupler-head, saidlatchpin hole being contracted-at the bottom of the coupler-head to a substantially semi-cylindrical form and 95` lying entirely outside of the path in which the jaw moves, as and for .the purpose shown and described. Y Y Y 2. As a latch -pin fory a carcouplercon` structed substantiallyas specified, thepin C Ion p the pinhole b2v and boundeddat its end by ',-a 55 i 

